local.h revision 2899de9b05f15e67966ed3d046709b48703a162a 
1/*	$OpenBSD: local.h,v 1.12 2005/10/10 17:37:44 espie Exp $	*/
2
3/*-
4 * Copyright (c) 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35/*
36 * Information local to this implementation of stdio,
37 * in particular, macros and private variables.
38 */
39
40#include <wchar.h>
41#include "wcio.h"
42#include "fileext.h"
43
44#pragma GCC visibility push(hidden)
45
46int	__sflush(FILE *);
47int	__sflush_locked(FILE *);
48FILE	*__sfp(void);
49int	__srefill(FILE *);
50int	__sread(void *, char *, int);
51int	__swrite(void *, const char *, int);
52fpos_t	__sseek(void *, fpos_t, int);
53int	__sclose(void *);
54void	__sinit(void);
55void	_cleanup(void);
56void	__smakebuf(FILE *);
57int	__swhatbuf(FILE *, size_t *, int *);
58int	_fwalk(int (*)(FILE *));
59int	__swsetup(FILE *);
60int	__sflags(const char *, int *);
61wint_t __fgetwc_unlock(FILE *);
62wint_t	__ungetwc(wint_t, FILE *);
63int	__vfprintf(FILE *, const char *, __va_list);
64int	__svfscanf(FILE * __restrict, const char * __restrict, __va_list);
65int	__vfwprintf(FILE * __restrict, const wchar_t * __restrict, __va_list);
66int	__vfwscanf(FILE * __restrict, const wchar_t * __restrict, __va_list);
67
68extern void __atexit_register_cleanup(void (*)(void));
69extern int __sdidinit;
70
71/*
72 * Return true if the given FILE cannot be written now.
73 */
74#define	cantwrite(fp) \
75	((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
76	 __swsetup(fp))
77
78/*
79 * Test whether the given stdio file has an active ungetc buffer;
80 * release such a buffer, without restoring ordinary unread data.
81 */
82#define	HASUB(fp) (_UB(fp)._base != NULL)
83#define	FREEUB(fp) { \
84	if (_UB(fp)._base != (fp)->_ubuf) \
85		free(_UB(fp)._base); \
86	_UB(fp)._base = NULL; \
87}
88
89/*
90 * test for an fgetln() buffer.
91 */
92#define	HASLB(fp) ((fp)->_lb._base != NULL)
93#define	FREELB(fp) { \
94	free((char *)(fp)->_lb._base); \
95	(fp)->_lb._base = NULL; \
96}
97
98#define FLOCKFILE(fp)   flockfile(fp)
99#define FUNLOCKFILE(fp) funlockfile(fp)
100
101#define FLOATING_POINT
102#define PRINTF_WIDE_CHAR
103#define SCANF_WIDE_CHAR
104#define NO_PRINTF_PERCENT_N
105
106/* OpenBSD exposes these in <stdio.h>, but we only want them exposed to the implementation. */
107__BEGIN_DECLS
108int __srget(FILE*);
109int __swbuf(int, FILE*);
110__END_DECLS
111#define __sfeof(p)     (((p)->_flags & __SEOF) != 0)
112#define __sferror(p)   (((p)->_flags & __SERR) != 0)
113#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
114#define __sfileno(p)   ((p)->_file)
115#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
116static __inline int __sputc(int _c, FILE* _p) {
117  if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) {
118    return (*_p->_p++ = _c);
119  } else {
120    return (__swbuf(_c, _p));
121  }
122}
123
124/* OpenBSD declares these in fvwrite.h but we want to ensure they're hidden. */
125struct __suio;
126extern int __sfvwrite(FILE *, struct __suio *);
127wint_t __fputwc_unlock(wchar_t wc, FILE *fp);
128
129#pragma GCC visibility pop
130